Improvement in bobbin-winders for sewing-machines



`bin J is held in position.

UNITED STATES PATENT OEEIcE. "`\v\f`\.

CHARLES H. PALMER, OF NEW YORK, N.

vIMPROVEMENT IN BOBBIN-WINDERS FOR SEWING-MACHINES.

Specification forming part of Letters Patent N0. 105, 363, dated July 12, 1870.

I, CHARLES H. PALMER, of the city, county, and State of New York, have invented a new and Improved Automatic Bobbin-Winder for dotted lines in Fig. 1,) with a projection,

against which the `set-screw V is made to impinge, for the purpose of regulating the eX- tent of motion of the frame C, on which all the apparatus is affixed. u.Ihe frame Gis made to turn freely upon thescrew swivel-pin F.

D is an automatic adjustable pressure-lever fixed to the oscillating shaft O, and the same shaft supports the spool 7c. j E is a cam trip-lever, with a spur, S, on its heel, which enters a mesh in the heel of pressure-lever D. (Seen in Figs. 1 and 3.) I

Gis the shaft or spindle by which the bob- On the left-hand section of it there is a socket, into which fits the point on the end of the bobbin, while on the right-hand section there are four small points or pins projecting. (Seen in Fig. 2.) These little pins surround ,a cone-like central projection on the end of bobbin J and enter a like number of holes in the end of the bobbin, and thus the bobbin is .prevented from turning on. the right-hand section of spindle G. H is a friction-wheel affixed on spindle Gr and impinging against driving-wheel I of the sewing-machine.

P is a coil-spring resting in a recess made in the upper side of B, and is applied so as to cause the frame C to turn upon the swivel F in such a manner as to relieve the frictionwheel H from wheel I when the spur S is thrown out of the nick in the heel of D.

L is an upright, on which the leading-arm Mis supported and thread adjusted, as shown.

The leading-arm M moves to and fro over the bobbin, like a crane, with nice precision, its motions being wholly dependent upon the impinging of the thread against itself as it is being wound on the bobbin.

N is a spiral spring, which holds the lefthand section of spindle G up against the bobbin J with sufficient pressure.

R is a spiral spring, one end of which is attached to the frame c and the other end to the pressure-lever D in such a manner as to cause D to press against the bobbin J.

Having thu's explained the construction of my invention, I next proceed to explain its operation.

The bobbin J and thread beingadjusted, the cam trip-lever E is thrown back until the ,spur S catches in a nick in the heel of pressure-lever D. In thus adjusting the lever E the adjustable frame C is made to turn upon its center by virtue of the cam end of E pressing upon the projection of disk B, and thus brings the friction-wheel' H in contact with driving-wheel I, while the spiral spring R makes lever D to press against bobbin J. Then, by turning the driving-wheel I, bobbin J is made to revolve by means of frictionwheel H, and as the thread begins to wind the leading-arm M begins to move back and forth with nice regularity, being regulated in its motions only by the thickness of the thread. As the bobbin gradually lls the thread steadily lifts pressure-lever D, and, at the mcment the bobbin is iilled, lever D has been lifted so as to let spur S slip from its nick, and instantly the adjustable frame O is thrown back by coil-spring P, and friction-wheel H being thus removed from contact with drivingwheel I, it follows that the winding is automatically arrested.

I claim- 1. The combination, with the movable frame C and disk B, of the pressure-lever D, spring P, and cam trip-lever E, all constructed substantially as described, and operating to bring the wheel Hinto contact with the drivingwheel of a sewing-machine for winding, and to release them from contact with each other `when the bobbin is full.

2. The combination, with the movable frame C and disk B, of the adjusting set-screw V, which regulates the extent of horizontal rotatory motion of the frame- G, as described.

CHARLES H. PALMER.

Witnesses J As. L. BERRIEN, GEO. W. RAMsAY. 

